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61. 发明申请

US20070263522A1 Objective lens apparatus, optical pickup apparatus, and optical disc driving apparatus 失效
标题翻译：物镜装置，光学拾取装置和光盘驱动装置
公开(公告)号：US20070263522A1
公开(公告)日：2007-11-15
申请号：US11790543
申请日：2007-04-26
申请人： Kenji Yamamoto , Noriaki Nishi
发明人： Kenji Yamamoto , Noriaki Nishi
IPC分类号： G11B7/00
CPC分类号： G11B7/0935 , G11B7/1374 , G11B2007/0006
摘要： An objective lens apparatus is disclosed. The apparatus includes: a first objective lens with a first numerical aperture, which is capable of focusing a laser light on a first optical record medium with a first cover layer of a first thickness; a second objective lens with a second numerical aperture smaller than the first numerical aperture, which is capable of focusing the laser light on a second optical record medium with a second cover layer of a second thickness larger than the first thickness; a third objective lens with a third numerical aperture smaller than the second numerical aperture, which is capable of focusing the laser light on a third optical record medium with a third cover layer of a third thickness larger than the second thickness; and a lens holder which holds the first objective lens, the second objective lens, and the third objective lens.
摘要翻译：公开了一种物镜设备。该装置包括：具有第一数值孔径的第一物镜，其能够将激光聚焦在具有第一厚度的第一覆盖层的第一光学记录介质上; 具有小于第一数值孔径的第二数值孔径的第二物镜，其能够将激光聚焦在具有大于第一厚度的第二厚度的第二覆盖层的第二光学记录介质上; 具有小于第二数值孔径的第三数值孔径的第三物镜，其能够将激光聚焦在具有大于第二厚度的第三厚度的第三覆盖层的第三光学记录介质上; 以及保持第一物镜，第二物镜和第三物镜的透镜保持器。

62. 发明授权

US07230903B2 Recording and playback apparatus and optical head including a variable optical coupling efficiency device 失效
标题翻译：记录和播放装置以及包括可变光耦合效率装置的光头
公开(公告)号：US07230903B2
公开(公告)日：2007-06-12
申请号：US11387832
申请日：2006-03-24
申请人： Noriaki Nishi , Hiroaki Mizuma , Motoi Kimura , Kenji Yamamoto , Masatoshi Nishino
发明人： Noriaki Nishi , Hiroaki Mizuma , Motoi Kimura , Kenji Yamamoto , Masatoshi Nishino
IPC分类号： G11B7/135
CPC分类号： G11B7/1263 , G11B7/128 , G11B7/1356 , G11B7/1369 , G11B7/1381
摘要： The light intensity of a light beam emitted from a light source is appropriately controlled when the light beam is transmitted through a variable optical coupling efficiency device in an optical head. During a read mode, the light beam from the light source is incident on an optical disk at an intensity relatively weaker than that of the light source. By switching the optical coupling efficiency of the variable optical coupling efficiency device between a write mode and a read mode, the light intensity directed to an optical recording medium is substantially varied from the write mode to the read mode. This arrangement eliminates the need for substantially increasing the optical output power ratio of the light source of write power to read power.
摘要翻译：当光束通过光学头中的可变光耦合效率器件传输时，适当地控制从光源发射的光束的光强度。在读取模式期间，来自光源的光束以比光源弱的强度入射到光盘上。通过在写入模式和读取模式之间切换可变光耦合效率器件的光耦合效率，指向光学记录介质的光强度从写入模式到读取模式基本上是变化的。这种布置消除了对读取功率的写入功率的光源的光输出功率比实质上增加的需要。

63. 发明申请

US20070127337A1 OPTICAL RECORDING MEDUIM DRIVING DEVICE 失效
标题翻译：光学记录媒体驱动设备
公开(公告)号：US20070127337A1
公开(公告)日：2007-06-07
申请号：US11674007
申请日：2007-02-12
申请人： Noriaki NISHI , Kenji Yamamoto
发明人： Noriaki NISHI , Kenji Yamamoto
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/0079 , G11B7/1263 , G11B7/1356 , G11B7/1365 , G11B7/1369 , G11B7/1395 , G11B19/12 , G11B2007/0006 , G11B2007/0013 , G11B2007/13727
摘要： A method and an apparatus for driving an optical recording medium for recording and/or reproducing various information for the optical recording medium, in which the output power ratio of the light source may be reduced for recording and reproduction, for optical recording media of different sorts, or for respective recording surfaces of a multilayered optical recording medium, so that optimum characteristics may be realized even with use of an easy-to-fabricate light source or a light source with a smaller light output rating. The intensity of a light beam emitted on an optical recording medium 102 by an optical head 104 is controlled by optical coupling efficiency varying elements 214, 215 depending on the sort of the optical recording medium 102, recording surfaces of a multi-layered optical recording medium, recording surfaces in the multi-layered optical recording medium or on the operating modes, in such a manner that the intensity of the light beam emitted on the optical recording medium 102 may be significantly varied without drastically increasing the output power ratio on the side light source 212.
摘要翻译：一种用于记录和/或再现用于记录和/或再现光记录介质的各种信息的光记录介质的方法和装置，其中光源的输出功率比可以减少用于记录和再现，用于不同种类的光记录介质或者对于多层光学记录介质的各个记录表面，即使使用易于制造的光源或具有较小的光输出等级的光源，也可以实现最佳特性。通过光学头104在光学记录介质102上发射的光束的强度由光学耦合效率变化元件214,215控制，这取决于光学记录介质102的种类，多层光学记录介质的记录表面在多层光学记录介质中或在操作模式下记录表面，使得在光学记录介质102上发射的光束的强度可以显着变化，而不会显着增加侧光上的输出功率比来源212。

64. 发明申请

US20050201220A1 Optical pickup device that corrects the spot shape of reflected light beams 失效
公开(公告)号：US20050201220A1
公开(公告)日：2005-09-15
申请号：US11124071
申请日：2005-05-09
申请人： Noriaki Nishi
发明人： Noriaki Nishi
IPC分类号： G11B7/09 , G11B7/007 , G11B7/12 , G11B7/135 , G11B11/105
CPC分类号： G11B11/10543 , G11B7/00718 , G11B7/0912 , G11B7/123 , G11B7/131 , G11B7/133 , G11B7/1353 , G11B7/1356 , G11B7/1359 , G11B7/1369 , G11B7/1378 , G11B7/1381 , G11B7/13927 , G11B7/1398 , G11B11/10576
摘要： An optical head in which focussing error is detected by a spot size method used for recording and/or reproducing information signals on or from an optical disc. The optical head includes a unit for correcting the spot shape between the objective lens and a photodetector device. The spot shape correcting unit corrects part or all of light spots formed on the photodetector by a light beam reflected back by the optical disc so that the spot diameter in a direction traversing a track on the optical disc will be larger than the spot diameter along the track.

65. 发明授权

US06940789B2 Optical pickup device that corrects the spot shape of reflected light beams 失效
标题翻译：光学拾取装置，用于校正反射光束的光斑形状
公开(公告)号：US06940789B2
公开(公告)日：2005-09-06
申请号：US09914350
申请日：2000-12-27
申请人： Noriaki Nishi
发明人： Noriaki Nishi
IPC分类号： G11B7/09 , G11B7/007 , G11B7/12 , G11B7/135 , G11B11/105 , G11B7/095
CPC分类号： G11B11/10543 , G11B7/00718 , G11B7/0912 , G11B7/123 , G11B7/131 , G11B7/133 , G11B7/1353 , G11B7/1356 , G11B7/1359 , G11B7/1369 , G11B7/1378 , G11B7/1381 , G11B7/13927 , G11B7/1398 , G11B11/10576
摘要： An optical head in which focussing error is detected by a spot size method used for recording and/or reproducing information signals on or from an optical disc. The optical head includes a unit for correcting the spot shape between the objective lens and a photodetector device. The spot shape correcting unit corrects part or all of light spots formed on the photodetector by a light beam reflected back by the optical disc so that the spot diameter in a direction traversing a track on the optical disc will be larger than the spot diameter along the track.
摘要翻译：一种光头，其中通过用于在光盘上记录和/或再现信息信号的光斑尺寸方法来检测聚焦误差。光头包括用于校正物镜和光电检测器件之间的斑点形状的单元。斑点形状校正单元通过由光盘反射回的光束校正在光电检测器上形成的光点的一部分或全部，使得沿着光盘上的轨道的方向上的光斑直径将大于沿着光盘的光点直径跟踪。

66. 发明申请

US20050117494A1 Optical head, optical recording medium recording and/or reproducing apparatus and recording and/or reproducing method using the optical head 失效
标题翻译：光头，光记录介质记录和/或再现装置以及使用光头的记录和/或再现方法
公开(公告)号：US20050117494A1
公开(公告)日：2005-06-02
申请号：US10498008
申请日：2002-12-18
申请人： Noriaki Nishi , Masaru Tezuka , Naoki Inoue , Kunika Hashimoto
发明人： Noriaki Nishi , Masaru Tezuka , Naoki Inoue , Kunika Hashimoto
IPC分类号： G02F1/13 , G11B7/00 , G11B7/004 , G11B7/1263
CPC分类号： G11B7/1263 , G11B7/00 , G11B7/1356 , G11B7/1369 , G11B2007/0006 , G11B2007/0013
摘要： An optical disk drive (101) for optically recording and/or reproducing information signals is provided in which the power of a light beam emitted from an optical head (104) to an optical disk (102) is controlled by an optical-coupling efficiency varying elements (214, 215) correspondingly to the type of the optical disk, recording layer in a multilayer optical disk and a mode of operation selected while a variation of the optical-coupling efficiency is being detected by a light-detecting element (216), thereby positively varying the optical-coupling efficiency in a minimum necessary time. Thus, the power of the light beam focused on the optical disk can be varied in a wide range without having to extremely raise the ratio in output power between modes of operation at a light source (212). Therefore, even a light source whose rating of optical output power is small can be used to write and read information signals to and from any of optical disks of different types or to each of recording layers in a multilayer optical disk with a high accuracy. Namely, good characteristics in writing and reading information signals can be assured without having to largely vary the ratio in output power of the light source from the write to read mode, from one to another type of optical disks or from one to another recording layer of the multilayer optical disk.
摘要翻译：提供用于光学记录和/或再现信息信号的光盘驱动器（101），其中从光学头（104）发射到光盘（102）的光束的功率由光耦合效率变化对应于光盘类型的元件（214,215），多层光盘中的记录层以及由光检测元件（216）检测光耦合效率的变化而选择的操作模式，从而在最小必要时间内积极地改变光耦合效率。因此，聚焦在光盘上的光束的功率可以在宽范围内变化，而不必极大地提高在光源（212）处的操作模式之间的输出功率的比率。因此，即使是光输出功率等级较小的光源也可以用于从多个光盘中的不同类型的光盘或每个记录层以高精度写入信息信号和从多层光盘中的每个记录层读取信息信号。即，可以确保写入和读取信息信号的良好特性，而不必大幅度地改变光源的输出功率与写入/读取模式之间的比例，从一种光盘到另一种类型的光盘，或从一种到另一种类型的光盘多层光盘。

67. 发明授权

US06717897B2 Optical pickup apparatus, optical disc apparatus, and track recognition signal detection method 失效
标题翻译：光拾取装置，光盘装置和轨道识别信号检测方法
公开(公告)号：US06717897B2
公开(公告)日：2004-04-06
申请号：US09903176
申请日：2001-07-11
申请人： Noriaki Nishi
发明人： Noriaki Nishi
IPC分类号： G11B700
CPC分类号： G11B7/131 , G11B7/00718 , G11B7/08541 , G11B7/0903 , G11B7/0906 , G11B7/0909 , G11B7/0943 , G11B7/133 , G11B7/1353
摘要： A primary spot and a secondary spot are formed on an optical disc 101. The primary spot is used for recording and reproduction. The secondary spot is positioned apart from the primary spot. The secondary spot differs from the primary spot in a distance from an objective lens. This distance (defocus amount) Def satisfies a range: 0.4×Def0≦Def≦1.7×Def0. It is assumed that a light source wavelength is &lgr;, a track pitch of the optical disc 101 is Tp, and a numerical aperture of the objective lens is NA and that Def0=[0.178&lgr;/{1−cos(sin−1 NA)}]·[{1−(&lgr;/(Tp·NA))}+2.35].
摘要翻译：在光盘101上形成主要点和次要点。主要点用于记录和再现。次要位置与主要位置分开。二次点与距离物镜一定距离的主要点不同。该距离（散焦量）Def满足范围：0.4xDef0 <= Def <= 1.7xDef0。假设光源波长为λ，光盘101的轨道间距为Tp，物镜的数值孔径为NA，并且Def0 = [0.178λ/ {1-cos（sin <-1> NA）}]。[{1-（lambda /（Tp.NA））} + 2.35]。

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